Q11552

Picture of the Day · NASA

Pathfinder on Mars

2026-07-04

On July 4th, 1997, using its own array of fireworks, a parachute, and a cocoon of airbags, the Mars Pathfinder spacecraft bounced like a giant beach ball at least 15 times before it came to rest on the surface of Mars at 10:07 AM Pacific Daylight Time. After its then novel airbag-assisted landing sequence was completed, Pathfinder transmitted this color mosaic to mission operators on Earth. In the scene from another world, the Mars Sojourner robot rover is visible in the foreground, crouched on top of the unfolded Pathfinder. About the size of a large house cat, the six-wheeled, solar-powered Sojourner became the first successful Martian rover. Surrounding Pathfinder are deflated airbags and the rock-strewn terrain of the Ares Vallis floodplain. In the distance Martian hills appear against a dusty brownish sky. The Pathfinder lander was subsequently renamed the Carl Sagan Memorial Station.

via NASA APOD

Key facts

Discovered by

K. Reinmuth

Discovery site

Heidelberg Obs.

Discovery date

31 January 1924

Named after

unknown

Alternative designations

1924 QF · A916 UE

Minor planet category

main-belt · ( outer ) , background

Observation arc

93.42 yr (34,123 d)

Aphelion

3.4848 AU

Perihelion

2.9262 AU

Semi major axis

3.2055 AU

Orbital period sidereal

5.74 yr (2,096 d)

Mean anomaly

232.16 °

Mean motion

0° 10 18.12 / day

Inclination

9.4449°

Longitude of ascending node

120.15°

Argument of perihelion

286.50°

Mean diameter

82.350 ± 1.096 km , 95.51 ± 27.79 km , 96.592 ± 2.896 km , 96.94 ± 3.6 km , 99.88 ± 36.30 km , 101.04 ± 1.37 km

Mass

(4.77 ± 0.68) × 10 kg

via Wikipedia infobox

Wikidata facts

Diameter

82.35

Orbital period

2094.232756466502

via Wikidata · CC0